用所给单词的适当形式填空。
1. Look, the children are doing morning _____ (exercise).
2. My brother and I like _____ (drink) coffee.
3. The bird can _____ (sing) the "ABC" song. It's very clever.
4. His mother often _____ (help) him to do his homework.
5. There are many _____ (different) between you and your twin brother.
6. I go to the movies _____ (first) a month.
7. He's too young. He can _____ (hard) ride a bike.
8. Our English teacher likes to wear _____ (color) clothes, because she wants to be young .
9. A good _____ (eat) habit is good for your health.
10. In winter, my father often goes _____ (skate) .